She is described as African-American, 5 ft. tall, 103 lbs. with brown eyes, black hair, and a light complexion. Her date of birth is March 18, 1997.
Police say Cook could possibly be in the area near 5900 S. Normal. They say she has no known mental or physical disabilities.
Anyone with information is asked to call 911 or contact Chicago Police Area Two Special Victims at (312) 747-8274.